A salinity indicator is used to determine the （）.

A grease gun is generally used to lubricate a （）.

Thermostatic expansion valves can be adjusted for （）.

An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）

When the steering gear is in operation, you should （）.

Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.

If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.

If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.

If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.